The episode, entitled "Mud, Sweat and Tears" will feature, Jill, 59, visiting fictional Fort Marshall to kick off the army base's annual Fun Run, a charity event to raise money for kids of military families. She'll also spend time with military spouses (many of them played by real enrolled members) discussing the challenges they face while their loved ones are deployed.

Said Nancy Dubuc, the president of Lifetime Networks, "We are honored to have Dr. Biden make a special appearance on Army Wives. Dr. Biden's inspiring commitment to military families should be commended, and, as longtime supporters of this cause, Lifetime Networks is proud to be her partner in relaying this message across America."

Jill has been working with First Lady Michelle Obama to raise awareness for military families. They'll appear in a public service announcement to air during the episode.